361 is my favourite portable at the moment,
I'd add one thing about the leather case: you are interting the player into it in the way one side remains uncovered, and this is the down side in your pocket because all rhe 3.5s are at the other side.

Would be probably better to make to insert the item from another side and that side to becovered instead of this one whereto connect 3.5mm jacks

They make both styles, insert from bottom and insert from top case on eBay.

https://www.ebay.com/itm/Original-Q...562459?hash=item3b2b7b2a1b:g:KxsAAOSwXHpcbRN1

No firmware downloads since 2015.